<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

    <style>
        #d1{
            background-color: red;
            width: 100px;
            height: 80px;
            border: solid 10px;
            border-top: 0px;
            padding: 10px 20px 30px 40px;
            margin: auto;
        }

        #d2{
            width: 100px;
            height: 100px;
            background-color: green;
        }

        #d3{
            width: 0px;
            height: 0px;
            border-bottom: 100px solid yellow;
            border-left: 50px solid transparent;
            border-right: 50px solid rgba(255,255,255,0);
        }

        #d4{
            width: 0px;
            height: 0px;
            border-right: 100px solid #999999;
            border-top: 50px solid transparent;
            border-bottom: 50px solid transparent;
            float: left;
        }

        #d5{
            width: 350px;
            height: 250px;
            background-color: #999999;
            float: left;
        }

        #d6{
            width: 400px;
            height: 400px;
            background-color: blueviolet;
            clear: left;
            border-radius: 50%;
        }
    </style>


</head>
<body style="background-color: #4598ea">

    <div id="d1">Hello</div>

    <div id="d2"></div>

    <div id="d3"></div>

    <div id="d4"></div>

    <div id="d5"></div>

    <div id="d6"></div>
</body>
</html>